Unexpected Convergence: A Case Report of Achalasia in a Patient With Multiple Sclerosis

Achalasia is an esophageal motility disorder marked by neuronal degeneration within the myenteric plexus, leading to impaired lower esophageal relaxation and swallowing dysfunction. Despite a detailed understanding of its features, the disease's cause remains unknown. Similarly, multiple sclerosis (MS) is an inflammatory demyelinating condition of uncertain cause. Autoimmunity has been suggested as a potential cause of both disorders, yet instances documenting their co-occurrence are rare. We report a case of achalasia diagnosed in a young woman during hospitalization for an apparent MS flare.